More key executives at Research in Motion are leaving the embattled phone maker as newly appointed CEO Thorsten Heins is under fire to turn things around.

Source: blackberry.com
CNBC has learned that Alistair Mitchell, former vice president, BBM Platform & Integrated Services is no longer with the company and Alan Brenner, senior vice president, BlackBerry Platform will be leaving the company after a transition period.

This news comes on the heels of disappointing fourth quarter results with revenue that missed analysts' expectations, the resignation of co-CEO Jim Balsillie, and news that the company would complete a “comprehensive review of strategic opportunities.”